Heat sink assembly

ABSTRACT

A heat sink assembly includes a heat sink and a grease cover. The heat sink includes a bottom plate. A layer of thermal grease is attached to a bottom surface of the bottom plate. A number of fasteners are mounted to the bottom plate. The grease cover defines a receiving recess for receiving the thermal grease. A number of magnets are fastened to the grease cover and attract the fasteners.

BACKGROUND

1. Technical Field

The present disclosure relates to a heat sink assembly.

2. Description of Related Art

A layer of thermal grease is generally attached to a bottom of a heat sink to improve heat conductivity between an electronic component and the heat sink. A grease cover is mounted to a bottom plate of the heat sink and covers the thermal grease, to protect the thermal grease. The grease cover engages with the bottom plate of the heat sink. However, the grease cover is easily deformed, so the grease cover cannot be recycled.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present embodiments. Moreover, in the drawings, all the views are schematic, and like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is an exploded, isometric view of an exemplary embodiment of a heat sink assembly, wherein the heat sink assembly includes a heat sink.

FIG. 2 is an inverted view of the heat sink of FIG. 1.

FIG. 3 is an assembled, isometric view of FIG. 1.

DETAILED DESCRIPTION

The disclosure, including the accompanying drawings, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.

FIGS. 1 and 2 show an exemplary embodiment of a heat sink assembly. The heat sink assembly includes a heat sink 20 and a grease cover 10.

The grease cover 10 includes a rectangular main body 11. The main body 11 includes two opposite sidewalls 12. A receiving recess 13 is defined in a top surface of the main body 11. Two blocks 15 extend from opposite ends of each sidewall 12. A recess 16 is defined in a top surface of each block 15. A magnet 18 is pasted on a bottom wall of each recess 16.

The heat sink 20 includes a substantially H-shaped bottom plate 21. A layer of thermal grease 22 is attached to a center of a bottom surface of the bottom plate 21. Four ferromagnetic fasteners 23, such as four screws, are respectively mounted to four corners of the bottom plate 21, with bottom ends of the fasteners 23 extending out of the bottom surface of the bottom plate 21.

FIG. 3 shows in assembly. The bottom plate 21 is placed on the top surface of the main body 11. The thermal grease 22 is received in the receiving recess 13. The bottom ends of the fasteners 23 are received in the recesses 16 and attracted to the magnets 18.

The grease cover 10 is attracted to the heat sink 20 by the magnets 18. When the grease cover 10 is detached from the heat sink 20, the grease cover 10 will not be damaged. Therefore, the grease cover 10 can be recycled.

Even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structure and the functions of the embodiments, the disclosure is illustrative only, and changes may be made in details, especially in the matters of shape, size, and arrangement of parts within the principles of the embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A heat sink assembly, comprising: a heat sink comprising a bottom plate, a layer of thermal grease attached to a bottom surface of the bottom plate, a plurality of fasteners mounted to the bottom plate; and a grease cover defining a receiving recess for receiving the thermal grease, a plurality of magnets fastened to the grease cover and attracting the plurality of fasteners.
 2. The heat sink assembly of claim 1, wherein a plurality of recesses is defined in the grease cover and receives the plurality of magnets.
 3. The heat sink assembly of claim 2, wherein the plurality of magnets is pasted on bottom walls of the plurality of recesses.
 4. The heat sink assembly of claim 2, wherein the grease cover comprises a rectangular main body, the receiving recess is defined in a top surface of the main body, four blocks are formed on four corners of the main body, the plurality of recesses is defined in top surfaces of the blocks.
 5. The heat sink assembly of claim 1, wherein each fastener is a screw. 